chore(ci): update named secret input

Author: heitorlessa

.github/workflows/on_schedule_monthly_roadmap_reminder.yml

@@ -15,4 +15,4 @@ jobs:
     call-workflow-passing-data:
         uses: aws-powertools/actions/.github/workflows/monthly_roadmap_reminder.yml@main
         secrets:
-            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+            token: ${{ secrets.GITHUB_TOKEN }}